. >> foreign and domestic policy issues will be in play thursday night. it's the only vice-presidential debate before the november 6 election. i'm christina mugler reporting. >> this thursday's vice-presidential debate may actually end up being the most watched v.p. showdown to date. >> that's due in large part to presidential debate that still has many people talking and we're joined by political deputy white house edward isaac dovar. thank you for being with us. how damaging was president obama's performance during the debate on wednesday is this >> a lot of people have been very concerned about it on the democratic side. and very excited about it on the republican side. because it really did change the tone of where things were for the past few weeks. the president was moving up in just about every estimation. and he had a real lackluster performance. let romney dominate things when it came to substance as well. and it has changed the mood of the race for sure. >> but that said, also something that might have changed the mood of the race a little bit,